On Tue, Jul 15, 2025 at 10:51:56AM -0600, Keith Busch wrote: > > Then in drivers/scsi/sd.c, inside sd_revalidate_disk() from the following coce, > > 3785 /* > > 3786 * Limit default to SCSI host optimal sector limit if set. There may be > > 3787 * an impact on performance for when the size of a request exceeds this > > 3788 * host limit. > > 3789 */ > > 3790 lim.io_opt = sdp->host->opt_sectors << SECTOR_SHIFT; > > Checking where "opt_sectors" was introduced, 608128d391fa5c9 says it was > to provide the host optimal sectors, but the io_opt limit is supposed to > be the device's. Seems to be a mistmatch in usage here, as "opt_sectors" > should only be the upper limit for "io_opt" rather than the starting > value. Oh, 'opt_sectors' does turn into an upper limit if sdkp->opt_xfer_blocks is valid, so I guess either that value is either unusable or a larger value than you're expecting.
